Valve for lifting devices



Jul 17,- 1934. J. D. cocHm Re. 19,239

VALVE FOR LIFTING DEVICES Original Filed May 16, 1927 2 Sheets-Sheet 1 Fig. 1.

IN VEN TOR.

BY VMcc'o.

A TTORNE-Y.

July I7, 1934. J. D. COCHIN Re; 19,239

VALVE FOR LIFTING DEVICES Original Filed May 16, 1927 Sheets-Sheet 2 INVENTOR.

JOHN .D. Comm A TTORNE Y.

Rcicsued July 17, 1934 Y Y f Re,

UNITED STATES PATENT OFFICE 1923!) VALVE FOR LIFIING DEVICES John D. Cochin, San Francisco, Calif.

Original No. 1,764,004, dated June 17, 1930,-Serial No. 191,579, May 16, 1927. Application for reissue July 29, 1931, Serial No. 553,865

9 Claims. (Cl. 277-1) This invention relates to improvements in oil to the inside of the casing for the purpose of valves adapted for use with lifting devices. elevating the ram. The oil, delivered under pres- An object of my invention is to provide a valve sure to the inside of the casing by the pipe 6, is for controlling the movement of a lifting device forced downwardly inside the grooves located in whereby a vehicle may be elevated above the the wall of the casing, and it thereafter exerts ground to enable the underneath portion of the suflicient pressure on the bottom of the ram 4 to vehicle to be readily accessible for the purpose of force it and the load located on the rack 5 in an repairing or cleaning the same. upward direction.

Another object of my invention is to provide The pipe 6 is suitably connected at its opposite 710 an improved valve for use with apparatus for eleend to a control valve '7 which is adapted to deliver vating automobiles or other objects above the oil with suiiicient pressure to elevate the ram 4. ,-surface of the ground, in which is embodied suit- Connecting the control valve 7 and an oil con- ;able means for safely maintaining the load at any taining tank 8 is a pipe 9 which is adapted to desired height. carry oil from the said tank to the said control Eli Another object of my invention is to provide an valve. (0 improved valve for use with apparatus for elevat- Connecting the tank 8 and the control valve 7 ing a load above the ground, which serves as a is a pipe 10 which is adapted to carry compressed .-suitable means for instantaneously stopping the air from the control valve to the tank. movement of the lifting part of the apparatus. L din fr m a source for Supplying a quantity "Q0 Other objects more or less apparent will preof compressed air, and suitably connected to the sent themselves or will be specifically pointed out control valve '1 is a pipe 10 which is adapted to in the description to follow. deliver sufficient quantities of compressed air In the accompanying drawings: f r th satisfactory operation of the apparatus. 7 Fig. 1 is a side elevation ofapparatus d for The control valve is enclosed by a casing 12 hav- 25 elevating vehicles or other objects with which my s Openings 1' ports 4, 15, 1 and 1'7 there-in invention may be used. through which a quantity of compressed air and Fig, 2 is a, top plan iew of my improved regu- Oil may enter the casing and pass therefrom. The

latmg valve, pipe 6 is connected to the casing at opening 15 Fig. 3 is a sectional view taken on the line 3--3 u h su table threads located on the inside s of PM surface of the walls of the opening, while the 95 Fig. 4 is a vertical sectional view taken on the other Oil p p 9 is similarly connected to the lmeHof 1 2 casing at opening 13. The pipe 11 which fur- 1 5 1 a t 1 ti al iew take n th nishes quantities of compressed air for the operaline 55 of Fig. 2. tion of the device, is connected to the casing at Fig. 6 is a side elevation of the regulating valve; Op 14 through uitable threads located on and the inside surface of the walls of the opening,

Fig. 7 is a vertical sectional view taken on the While h other omp e sed air carrying pipe 10 line 17 o1 Fig. 2. is similarly connected to the casing at opening Referring to the drawings, the numeral 1 repre- 17. The op 16 is a means for wi 40 cents a cylindrical shaped casing having t l w r quantities of compressed air not required for liftend closed by a bottom plate 2, its upper end proing purposes to escape from the valve. vided with a re-enforcing ring 3, d it id Removably screwed into the bottom of the cascircumferential surface provided with a plurality in 12 are w caps 18 having yl d a shaped of vertically extending grooves. Movably locat d supports 19 extending vertically therein. Mov- 45 inside the casing 1 and the ring 3, with t 1 ably located in the supports 19 are valve stems 10 cumferential surface movably contacting with the 20 w i carry Valve heads and x nding inside surface of the casing, is a ram 4 hi h ha aroundthe said supports 19 with their ends cona rack 5 secured to its upper end. The casing 1 tracting with the bottom of the caps 18 and the and the ram 4 are placed in operating positign underneath side of valve heads 21 are spiral 5o beneath the surface of the ground or floor, with springs 22 which tend to force the valve heads the rack 5 suitably projecting above the ground p dly and keel them seated on their valve so as to engage with the underneath part of seats,'as will be later described. vehicle or other load to be elevated. Removably screwed into the bottom of the eas- Extending through the ring 3 to the inside of ing 12 are two caps 23 having cylindrical shaped 55 the casing 1, is a pipe 6 which is adapted to carry supports 24 extending vertically therein. Mov 9 ing holes therein which provide seats for the j ining thelmtion phte;

valve heads 21, and with the bottom of the casing is a vertically ex- 15 tending wall 29 which is located between the two valve stems 20. Extending vertically Irena vthe top to the bottom of thC-WJflMW in a parallel plane to the axes of the 13 and 15, is a partition 30, which has anedge of the 20 U-shaped partition member 28 secured tl'iereto. A

win n 01 emes: marin w: ofl o 9 8 8 12, one the sidesoi' the casing and w cham e s l n s fl 56 beneath the valve heads 21, one of which connects with the opening other with the opelling 15. I

Extending from the bottom of the casing 12 in a d h r zontal direction with its edges scarred to thcpartitionml and aside oi the cas- -ing,is a U-shaped partition member -31 which enclosesa locatedaround one of the valve s ms-2am which i inmvided with a hole that a scatter ono oi the valve heads 26. I

Extending from the top of the casing 12 in -a downward and horizontal direction with its edges secured to thepartitionii anda side of the casing, is a partition member 32 which encloses a chamlocated above one of the valve heads 26. and mo w 7 ispr'ovidedvdth ahole that tormsa seat {or valve head. Thepartition members3l and 32,a side of the M312, thetopand bottoms)! 3oenoloses ashamwhieh a quantity of, eomprewd air vertically above the valve heads 21 An 2 m, l at which w Bethe heads-and adapted toiorce them as will belater'described. ,ilhe-pins ex emliugdcwn- 6151 m osifionibyiugs'ai p 1 topotthe casing Band by nu screwed-intoproiections 36 located the said ussandnuts, andar 'Wtqhe forceddpwnwardly by a lever member a'l whieh is pivoted abovethe casing on a pm i 1 l li cheitends-throuah the s id me b i proiection'lia locatedontbe topoithe '7 'Ihelever 3'1 iaprovided -with an qperating handle woI a d-is sovmsitioned o 'the a inz tha 'when it is moved in direction it presses against two or thepins 33 located above one ot the valve'heads ms the p osite direction it midst the we .33 which located above the the last .two mmtioned valve -heads to In operation. ll opheing moved V 37 paove itsniyot and force twoxot the-,plns

,170 olln.

- .v causing the a: $5 26and21xhich-are locatedadjacentopenings' 14 The delivers the oilto the casing v thegrooves located'in opposite direction to move'ment of the handle,

;ber 28, iron; whence 212ml valve heads 26, thereby :in'. and means movably associated jlhgs .in the, partitions for closing and opening the w ipaisoausesithe lever member times and 13 to become unseated. A.quantity of compressed air supplied by the pipe 11 enters the easing 12 through the opening 14 and passes upwardly through the hole located in the partition member 31, around one of the valve heads 26, and out through the opening 17 into pipe 10, which Y elivers it to the tank 8. The compressed air so ontuin gth'e tm'ilg forces a quantityaoi oillocated therein through the pipe 9, from which it is delivered to the inside of the casing 12 through opening 13. The oil entering the casing passes upwardly around the valve head 21 which has .ib flli wtd downwardly by a pin 33, and through "of the chamber located above the other valve head 21, and forces the said valve head downwardly,

.aftet wlich it passes through the hole in the partition member 28 located adjacent the said valve head, and out through opening 15 into the pipe 6. r .1. af to the bottom thereof thr the a DI h said cas ng and exerts the necessary force on the bottom or which it proceeds therein 4 to properly elevate. it and theoload Ill- 1M oatedonthe rack 5. u After the ram has beenso elevated, thef same may be lowered by moving the handle 39".ih the that reviousl n icated. Upon moving thehandle39 toward the opening ioli 15 the valve head 26, the valve'heads 21 andzs' which were not previouslyihy the first described forced open by the pins 33, are now pressed downwardly by the saidpin's, thereby allowing the compressedair located in uo the valve 7 topass upwardly through the hole the partition member 32 and escape through the opening 16 located in the casing 12. 'I'hevalve head 21,1ocated adiacent the opening 15 is Iorced downwardly, and the, oil heretofore locatedin the m casing l is forced through the pipes by'tlieload" on the ram, and into the casing '12 through the opening 15 located therein' The oil so coming back into the casing 12, passes upwardly around e yalve head 21, ,through the openinglocated m inthe partition member 28; thereafter forcing theother valve head 21 downwardly and passing through the other opening in the partitionme mit proceeds through :the opening 13 and pipe 9 back lnto'thetankd, 41 Altho h I have described my inventionwlth considerable detail it is apparent to those skilled .in the artthat the same may be embodied in 'rality of openings in its sides, a vertical partition extending from the top to the bottom ofthe ing, a longitudinally extending partition'located ,at one side oi'the vertical partition between the 440 top bottom of the casing and having a piu= .rality oiopeningstherein, a plurality of partitions located in the casing at the opposite side or the vertical partitiomeach having an therewith the p n- 445 saidopenings therein, whereby quantities of compressed air'ahd liquid maybe allowed to pass through. the cas n in ce tain .directi n ia s 2. In a control valve, a casing having a plurality of openings in its sides, a vertical partition extending longitudinally through the casing, a plurality of horizontally disposed partitions located in the casing at the sides of the vertical partition, whereby the casing is divided into a plurality of chambers and means located in the horizontal partitions for allowing compressed air and liquid to flow through the casing in certain directions at certain times.

3. In a control valve, a casing having a plurality of openings in its sides, a vertical partition extending longitudinally through the casing from the top to the bottom thereof, a plurality of partitions located in the casing with edges thereof secured to the vertical partition, whereby a. plurality of passageways communicating with the openings in the casing are formed inside the casing, and means for controlling the movement of compressed air and liquid through the passageways.

4. In a control valve, a casing having a plurality of openings in its sides, a partition extending longitudinally through the casing and from the top to the bottom thereof, a plurality of partitions located in the casing at the sides of the first mentioned partition having openings therein which allow quantities of liquid and compressed air to pass from one side of each of the last named partitions to its opposite side, and means for closing certain of the openings in the partitions and opening others by one and the same operation.

5. In a control valve, a casing having a plurality of openings therein, a vertical partition extending lengthwise through the casing from the top to the bottom thereof, a horizontal partition located in the casing at one side of the vertical partition and having an opening therein, a plurality of partitions located in the casing at the other side of the vertical partition, each of which has an opening therein, a plurality of valve heads movably associated with the openings in the partitions, a plurality of pins movably supported by the casing and in contact with the valve heads, and a lever member movably mounted on the casing, which said member is adapted to be moved in certain directions against certain of the pins at certain times, whereby certain of the valve heads may be removed from the openings in the partitions at certain times.

6. In a control valve, a casing having a plurality of openings therein, a partition extending from the top to the bottom of the casing, a horizontal partition located at one side of the first mentioned partition, a plurality of horizontal partitions located at the opposite side of the said first mentioned partition, the said horizontal partitions having openings therein, means associated with the openings in the partitions for opening and closing the same, and means for actuating the first mentioned means.

7. A valve mechanism to control a hydraulic lift of the type operated by liquid under gas pressure, said valve mechanism comprising a casing, a plurality of valves therein, one for controlling the ilow of compressed gas to drive the liquid forward, one for controlling the exhaust of compressed gas to permit the liquid to return, and one for controlling the return of liquid, said air valves being check-valves arranged to be held normally closed by the pressure of the gas thereagainst, a dead-man control lever for all of said valves and normally returned to and retained in neutral position by the air valves when in closing and closed position and arranged to open one of said air valves when moved from neutral in one direction and to open the other air valve and the liquid valve when moved from neutral in the opposite direction.

8. A valve mechanism to control a hydraulic lift of the type operated by liquid under gas pressure, said valve mechanism comprising a casing, a plurality of check-valves therein, one for controlling flow of compressed gas to drive the liquid forward, one for controlling exhaust of compressed gas to permit the return of liquid, and one to control the return of liquid, each of said valves being arranged to be held normally closed by the pressure of fluid thereagainst, a stem for each valve projecting through the casing, and a control means co-operating with said stems and arranged to open one air valve when in one position and to open the other air valve and the liquid valve when in the opposite position, said control means being free to move to neutral position in response to the closing movement of the valves when pressure is applied thereagainst, whereby to provide a dead-man control.

9. A valve mechanism for hydraulic lifts operable by liquid actuated by gas, comprising a casing having a gas conduit and a liquid conduit, normally closed valves to control flow through said conduits on selectively opening said valves, one of said valves being closable by fluid pressure thereat, and manually operable means having a neutral and two operative positions and being normally in neutral position by virtue of the pressure against said valve, said valve on the one hand and said means on the other hand being mutually operable, said means selectively opening different valves on movement to said operative positions, said valve on being closed by pressure moving said means to neutral position, whereby on release of said means flow through said liquid conduit will cease.

JOHN D. COCHIN. 

